Island



(No Model.)

I 2 Sheets-Sheet 1. O. M. FAIRBANKS.

MACHINE FOR CUTTING THE EDGES 0F PLAT FILES.

,INVEN UR.

N.-PETER5. Pmmumnghmr. wgnhingmm m;

(No Model.) 2 Sheets-Sheet 2.

0. M. FAIRBANKS. MAGHINE FOR CUTTING THB EDGES 0F FLAT FILES.

No. 374,051; Patented Nov. 29,1887.

Wl'TNESEEE INVENTEIR.

'To all whom it may concern.-

UNITED STATES PATENT OFFICE.

CRAWFORD M. FAIRBANKS, OF LIN COLN, RHODE ISLAND.

MACHINE FOR CUTTING THE EDGES OF FLAT FILES.

SPECIFICATION forming part of Letters Patent No. 374,051, dated November 29, 1887. Application filed June 6. 1887. Serial No. 240,382. (No model.)

Be it known that I, CRAWFORD M. FAIR- BANKS,Of Lincoln, in the State of Rhode Island, have made certain new and useful Improvements in Machines for Cutting the Edges of Flat Files; and I do hereby declare that the following specification, taken in connection with the drawings making a part of the same, is a full, clear, and exact description thereof.

Figure 1 is an elevation of my improvedimachine. Fig. 2 is a transverse section of frame and file-carriage and adjusting devices. Fig. 3 is a transverse section of frame and file-car riage and devices for holding the file. Fig. 4 is a top view of frame and file-carriage and de vices for holding the file. Fig. 5 is a modification of the adjusting devices.

The objectof my invention is to increase the rapidity and facility with which files may be made by machinery and to secure an even wear of the cuttingtool; andit consists in the de vices for adjusting the carriage and holding and guiding the file, as hereinafter described.

In the drawings, A is the frame of the machine, supported by a suitable standard, 13.

C is a, cutting-tool secured to an arm, D,

which is pivoted to the frame and operated by a cam, E, and spring F. The movement of the arm D causes the tool to strike the file-blank secured beneath.

G is the file-blank,which is secured upon a carriage, H, diagonally to its line of movement. Motion is communicated to the carriage H by ascrew-arbor, I, working through a nut, J pivoted to the carriage. The file-blank G is placed against a vertical shoulder, K, and held in that position by a spring-actuated rod, L,which accommodates itself to the varying distance of the blank from the side of the carriage.

M is asetscrew working in a horizontal arm, N, and is operated to secure a rocking adj ustment of the carriage H.

The placing of the blank diagonally upon the bed secures the even Wear of the tool, inasmuch as each portion of its edge will be required to perform a share of the work in passing the length of the blank.

\Vhenever it is found that the cutting-tool is not striking squarely, but is cutting the teeth deeper upon one side than the other, the operator can easily and quickly make the necessary adjustment of the carriage by raising or de' pressing (as the case may require) the set-screw M. The spring actuated rod L operating against the screw will accommodate itself to the new adjustment to hold the carriage at any desired angle or degree of tip.

In Fig. 5 a difierent construction of the spring-actuated rod is shown, the principle and operation, however, remaining practically the same, the blank being held by a clamp.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. A spring-actuated rod, L, secured to the frame of the machine, in combination with the carriage H, for holding the blank in place, as specified.

2. The combination of the carriage H, the spring-actuated rod L, and the adj Listing-screw M, for adjusting and holding the carriage at any desired a gle,as and forthe purposes specified. 1

CRAWFORD M. FAIRBANKS. Witnesses:

WALTER B. VINCENT, CORNELIUS P. WHITE. 

